Bat made of composite material

ABSTRACT

A bat includes a hollow handle, a head portion mounted on a first end of the handle, a tail portion mounted on a second end of the handle, and an elastic plate mounted in an inside of the handle. Thus, when the handle hits a ball, the elastic plate is deformed by the impact force applied by the ball, so that the elastic plate produces a reaction bouncing force to the handle to maintain the stiffness and strength of the handle and to enhance the hitting force of the handle so as to strike the ball exactly, thereby enhancing the striking effect of the handle efficiently.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a bat, and more particularly to a batmade of composite material.

2. Description of the Related Art

A conventional bat made of composite material in accordance with theprior art shown in FIGS. 5 and 6 comprises a hollow handle 1. The handle1 is made of a fiber strap woven by composite material. The fiber strapis wound around a core and placed into a die. Then, the fiber strap isinflated, heated and pressed to form the handle 1. Thus, the handle 1has a greater stiffness. In addition, the handle 1 has a resiliencesmaller than that of an aluminum handle, thereby preventing the handle 1from being deformed by the hitting force applied by the ball.

However, the handle 1 has a smaller resilience, so that the handle 1cannot hit the ball too far, thereby decreasing the ball strikingeffect. In addition, the handle 1 has a greater stiffness, so that thehandle 1 is easily broken when the hitting force is too large.

SUMMARY OF THE INVENTION

In accordance with the present invention, there is provided a bat,comprising a hollow handle, a head portion mounted on a first end of thehandle, a tail portion mounted on a second end of the handle, and anelastic plate mounted in an inside of the handle.

The primary objective of the present invention is to provide a bathaving a larger bouncing force when hitting the ball.

Another objective of the present invention is to provide a bat, whereinwhen the handle hits a ball, the elastic plate is deformed by the impactforce applied by the ball, so that the elastic plate produces a reactionbouncing force to the handle to maintain the stiffness and strength ofthe handle and to enhance the hitting force of the handle so as tostrike the ball exactly, thereby enhancing the striking effect of thehandle efficiently.

A further objective of the present invention is to provide a bat,wherein when the handle hits a ball, the elastic plate together with theintermediate layer is deformed by the impact force applied by the ball,so that the elastic plate together with the intermediate layer producesa reaction bouncing force to the handle to maintain the stiffness andstrength of the handle and to enhance the hitting force of the handle soas to strike the ball exactly, thereby enhancing the striking effect ofthe handle efficiently.

Further benefits and advantages of the present invention will becomeapparent after a careful reading of the detailed description withappropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view of a bat in accordance with thepreferred embodiment of the present invention.

FIG. 2 is a partially cut-away plan cross-sectional assembly view of thebat as shown in FIG. 1.

FIG. 3 is a partially perspective assembly view of the bat as shown inFIG. 1.

FIG. 4 is a partially cut-away plan cross-sectional assembly view of abat in accordance with another preferred embodiment of the presentinvention.

FIG. 5 is a perspective view of a conventional bat in accordance withthe prior art.

FIG. 6 is a plan cross-sectional view of the conventional bat as shownin FIG. 5.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIGS. 1-3, a bat inaccordance with the preferred embodiment of the present inventioncomprises a hollow handle 2, a head portion 3 mounted on a first end 20of the handle 2, a tail portion 4 mounted on a second end 22 of thehandle 2, and an elastic plate 5 mounted in an inside of the handle 2.The elastic plate 5 has a shape of a coil spring. The elastic plate 5has an outer diameter substantially equal to an inner diameter of thehandle 2.

In assembly, the elastic plate 5 is pulled and extended outward toshorten the outer diameter of the elastic plate 5, so that the elasticplate 5 is extended through the open first end 20 of the handle 2 andinserted into the inside of the handle 2. The elastic plate 5 isrestored to the original state by its restoring force after the elasticplate 5 is inserted into the inside of the handle 2 to expand the outerdiameter of the elastic plate 5, so that the elastic plate 5 is closelyfit in an inner wall of the handle 2 and is not connected to the innerwall of the handle 2. The first end 20 of the handle 2 has a determineddiameter to receive the elastic plate 5, and the second end 22 of thehandle 2 has a tapered section 24 to stop the elastic plate 5. Thus, theelastic plate 5 has a first end stopped by the head portion 3 and asecond end stopped by the tapered section 24 of the second end 22 of thehandle 2, so that the elastic plate 5 is positioned in the inside of thehandle 2 and cannot slip in the inside of the handle 2.

In operation, when the handle 2 hits a ball, the elastic plate 5 isdeformed by the impact force applied by the ball, so that the elasticplate 5 produces a reaction bouncing force to the handle 2 to maintainthe stiffness and strength of the handle 2 and to enhance the hittingforce of the handle 2 so as to strike the ball exactly, therebyenhancing the striking effect of the handle 2 efficiently.

Referring to FIG. 4, the bat further comprises an intermediate layer 6mounted in the inside of the handle 2 and located between the elasticplate 5 and the inner wall of the handle 2. The intermediate layer 6 ismade of plastic material and has an optimum diameter ranged between 0.2mm and 0.5 mm (the optimum diameter of the intermediate layer 6 istested by experiments). Thus, the elastic plate 5 together with theintermediate layer 6 is closely fit in the inner wall of the handle 2and is not connected to the inner wall of the handle 2.

In operation, when the handle 2 hits a ball, the elastic plate 5together with the intermediate layer 6 is deformed by the impact forceapplied by the ball, so that the elastic plate 5 together with theintermediate layer 6 produces a reaction bouncing force to the handle 2to maintain the stiffness and strength of the handle 2 and to enhancethe hitting force of the handle 2 so as to strike the ball exactly,thereby enhancing the striking effect of the handle 2 efficiently.

Although the invention has been explained in relation to its preferredembodiment(s) as mentioned above, it is to be understood that many otherpossible modifications and variations can be made without departing fromthe scope of the present invention. It is, therefore, contemplated thatthe appended claim or claims will cover such modifications andvariations that fall within the true scope of the invention.

1. A bat, comprising: a hollow handle; a head portion mounted on a firstend of the handle; a tail portion mounted on a second end of the handle;an elastic plate mounted in an inside of the handle.
 2. The bat inaccordance with claim 1, wherein the elastic plate has a shape of a coilspring.
 3. The bat in accordance with claim 1, wherein the elastic platehas an outer diameter substantially equal to an inner diameter of thehandle.
 4. The bat in accordance with claim 1, wherein the elastic plateis closely fit in an inner wall of the handle.
 5. The bat in accordancewith claim 1, wherein the elastic plate is not connected to an innerwall of the handle.
 6. The bat in accordance with claim 1, wherein thefirst end of the handle has a determined diameter to receive the elasticplate, and the second end of the handle has a tapered section to stopthe elastic plate.
 7. The bat in accordance with claim 6, wherein theelastic plate has a first end stopped by the head portion and a secondend stopped by the tapered section of the second end of the handle, sothat the elastic plate is positioned in the inside of the handle andcannot slip in the inside of the handle.
 8. The bat in accordance withclaim 1, further comprising an intermediate layer mounted in the insideof the handle and located between the elastic plate and the handle. 9.The bat in accordance with claim 8, wherein the intermediate layer ismade of plastic material.
 10. The bat in accordance with claim 8,wherein the intermediate layer has an optimum diameter ranged between0.2 mm and 0.5 mm.
 11. The bat in accordance with claim 1, wherein theelastic plate together with the intermediate layer is closely fit in aninner wall of the handle.
 12. The bat in accordance with claim 1,wherein the elastic plate together with the intermediate layer is notconnected to an inner wall of the handle 2.